Completed the trip to client and back.

src/field.rs

@@ -8,6 +8,15 @@ pub enum Field {
     Uuid(Uuid),
 }
 
+impl Field {
+    pub fn to_uuid(&self) -> Result<Uuid, String> {
+        match self {
+            Field::Uuid(data) => Ok(data.clone()),
+            _ => Err("not a uuid".to_string()),
+        }
+    }
+}
+
 impl From<String> for Field {
     fn from(value: String) -> Self {
         match Uuid::try_from(value.as_str()) {
@@ -121,4 +130,24 @@ mod fields {
         let input: Field = result.clone().into();
         assert_eq!(input.to_string(), result);
     }
+
+    #[test]
+    fn field_to_uuid() {
+        let id = Uuid::new_v4();
+        let field: Field = id.into();
+        match field.to_uuid() {
+            Ok(result) => assert_eq!(result, id),
+            Err(_) => unreachable!("did not convert to uuid"),
+        }
+    }
+
+    #[test]
+    fn not_uuid_field_to_uuid() {
+        let text = "Not a uuid.";
+        let field: Field = text.into();
+        match field.to_uuid() {
+            Ok(_) => unreachable!("should return an error"),
+            Err(_) => {},
+        }
+    }
 }